Revert "Delete CC."

cc/test/test_occlusion_tracker.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_TEST_TEST_OCCLUSION_TRACKER_H_
+#define CC_TEST_TEST_OCCLUSION_TRACKER_H_
+
+#include "cc/layers/render_surface.h"
+#include "cc/layers/render_surface_impl.h"
+#include "cc/trees/occlusion_tracker.h"
+
+namespace cc {
+
+// A subclass to expose the total current occlusion.
+template <typename LayerType>
+class TestOcclusionTracker : public OcclusionTracker<LayerType> {
+ public:
+  explicit TestOcclusionTracker(const gfx::Rect& screen_scissor_rect)
+      : OcclusionTracker<LayerType>(screen_scissor_rect) {}
+
+  SimpleEnclosedRegion occlusion_from_inside_target() const {
+    return OcclusionTracker<LayerType>::stack_.back()
+        .occlusion_from_inside_target;
+  }
+  SimpleEnclosedRegion occlusion_from_outside_target() const {
+    return OcclusionTracker<LayerType>::stack_.back()
+        .occlusion_from_outside_target;
+  }
+
+  SimpleEnclosedRegion occlusion_on_contributing_surface_from_inside_target()
+      const {
+    size_t stack_size = OcclusionTracker<LayerType>::stack_.size();
+    if (stack_size < 2)
+      return SimpleEnclosedRegion();
+    return OcclusionTracker<LayerType>::stack_[stack_size - 2]
+        .occlusion_from_inside_target;
+  }
+  SimpleEnclosedRegion occlusion_on_contributing_surface_from_outside_target()
+      const {
+    size_t stack_size = OcclusionTracker<LayerType>::stack_.size();
+    if (stack_size < 2)
+      return SimpleEnclosedRegion();
+    return OcclusionTracker<LayerType>::stack_[stack_size - 2]
+        .occlusion_from_outside_target;
+  }
+
+  void set_occlusion_from_outside_target(const SimpleEnclosedRegion& region) {
+    OcclusionTracker<LayerType>::stack_.back().occlusion_from_outside_target =
+        region;
+  }
+  void set_occlusion_from_inside_target(const SimpleEnclosedRegion& region) {
+    OcclusionTracker<LayerType>::stack_.back().occlusion_from_inside_target =
+        region;
+  }
+
+  void set_occlusion_on_contributing_surface_from_outside_target(
+      const SimpleEnclosedRegion& region) {
+    size_t stack_size = OcclusionTracker<LayerType>::stack_.size();
+    DCHECK_GE(stack_size, 2u);
+    OcclusionTracker<LayerType>::stack_[stack_size - 2]
+        .occlusion_from_outside_target = region;
+  }
+  void set_occlusion_on_contributing_surface_from_inside_target(
+      const SimpleEnclosedRegion& region) {
+    size_t stack_size = OcclusionTracker<LayerType>::stack_.size();
+    DCHECK_GE(stack_size, 2u);
+    OcclusionTracker<LayerType>::stack_[stack_size - 2]
+        .occlusion_from_inside_target = region;
+  }
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_TEST_OCCLUSION_TRACKER_H_